Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/1268
Título: Blue-enhanced thin-film photodiode for dual-screen x-ray imaging
Autor: Vygranenko, Yuri
Sazonov, A.
Heiler, G.
Tredwell, T.
Vieira, Maria Manuela Almeida Carvalho
Nathan, Arokia
Palavras-chave: Current density
p-i-n photodiodes
Thin films
X-ray imaging
Data: 28-Dez-2009
Editora: Amer Inst Physics
Citação: Vygranenko Y, Sazonov A, Heiler G, Tredwell T, Vieira M, Nathan A. Blue-enhanced thin-film photodiode for dual-screen x-ray imaging.Applied Physics Letters. 2009; 95 (26): Art. No. 26350.
Relatório da Série N.º: 26; 26350
Resumo: This article reports on a-Si:H-based low-leakage blue-enhanced photodiodes for dual-screen x-ray imaging detectors. Doped nanocrystalline silicon was incorporated in both the n- and p-type regions to reduce absorption losses for light incoming from the top and bottom screens. The photodiode exhibits a dark current density of 900 pA/cm(2) and an external quantum efficiency up to 90% at a reverse bias of 5 V. In the case of illumination through the tailored p-layer, the quantum efficiency of 60% at a 400 nm wavelength is almost double that for the conventional a-Si:H n-i-p photodiode.
Peer review: yes
URI: http://hdl.handle.net/10400.21/1268
ISSN: 0003-6951
Aparece nas colecções:ISEL - Eng. Elect. Tel. Comp. - Artigos

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